Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The rigidity of the top space frame structure in its own plane can be assumed to be infinite, similar to the role of a rigid floor, connecting the columns into a whole, but it does not provide the lateral stiffness of the structure. The role of the space frame is to connect the columns together to provide anti-side movement stiffness. The total side movement stiffness of the structure is the sum of the side movement stiffness of each column.
But for a single column, there is no reliable lateral support point at the space frame support, and the upper end is the free end. The connection between the space frame and the steel column is of course hinged, but the key to the problem is not that. The key is that the structure is a side-shifted structure. For such a structure where the bottom of the column is rigidly connected to the foundation, because the top of the column is side-shifted, No matter if the top of the column is free or hinged.
The influence of the space frame on the column:
If the space frame is considered to be completely rigid, the theoretical calculation length factor of the column is 0.7. If the constraint of the space frame to the column is small, the calculated length factor of the column is greater than 0.7.
The influence of the column on the space frame:
If the rigidity of the column is large, and the horizontal displacement is restricted by the connection node of the space frame and the column, the temperature stress of the space frame cannot be released, and the compressive stress of the upper chord of the space frame frame under the action of temperature stress is fully considered.
The above is the interpretation of the interaction between the space frame and the steel column. If you want to know more about the space frame, please contact my email: safs139@safsteelstructure.com
